4e83f749ec
during the FS sync. The system would appear to hang momentarily if there was a large backlog of I/O. This is because the vnode remains locked during the output - preventing normal character I/O. The problem was exacerbated by the FFS contiguous block allocation fixes and a semi-broken disksort(). The inode/date will still be synced during a normal FS dismount and whenever the inode is changed for other reasons.
890 lines
22 KiB
C
890 lines
22 KiB
C
/*
|
|
* Copyright (c) 1989, 1991, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
|
|
* $Id: ffs_vfsops.c,v 1.13 1995/03/16 18:16:41 bde Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/file.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
|
|
int ffs_sbupdate __P((struct ufsmount *, int));
|
|
int ffs_flushfiles __P((struct mount *, int, struct proc *));
|
|
int ffs_reload __P((struct mount *,struct ucred *,struct proc *));
|
|
int ffs_oldfscompat __P((struct fs *));
|
|
|
|
struct vfsops ufs_vfsops = {
|
|
ffs_mount,
|
|
ufs_start,
|
|
ffs_unmount,
|
|
ufs_root,
|
|
ufs_quotactl,
|
|
ffs_statfs,
|
|
ffs_sync,
|
|
ffs_vget,
|
|
ffs_fhtovp,
|
|
ffs_vptofh,
|
|
ffs_init,
|
|
};
|
|
|
|
VFS_SET(ufs_vfsops, ufs, MOUNT_UFS, 0);
|
|
|
|
extern u_long nextgennumber;
|
|
|
|
/*
|
|
* Called by main() when ufs is going to be mounted as root.
|
|
*
|
|
* Name is updated by mount(8) after booting.
|
|
*/
|
|
#define ROOTNAME "root_device"
|
|
|
|
int
|
|
ffs_mountroot()
|
|
{
|
|
register struct fs *fs;
|
|
register struct mount *mp;
|
|
struct proc *p = curproc; /* XXX */
|
|
struct ufsmount *ump;
|
|
u_int size;
|
|
int error;
|
|
|
|
/*
|
|
* Get vnodes for swapdev and rootdev.
|
|
*/
|
|
if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp))
|
|
panic("ffs_mountroot: can't setup bdevvp's");
|
|
|
|
mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
|
|
bzero((char *)mp, (u_long)sizeof(struct mount));
|
|
mp->mnt_op = &ufs_vfsops;
|
|
mp->mnt_flag = MNT_RDONLY;
|
|
error = ffs_mountfs(rootvp, mp, p);
|
|
if (error) {
|
|
free(mp, M_MOUNT);
|
|
return (error);
|
|
}
|
|
error = vfs_lock(mp);
|
|
if (error) {
|
|
(void)ffs_unmount(mp, 0, p);
|
|
free(mp, M_MOUNT);
|
|
return (error);
|
|
}
|
|
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
mp->mnt_flag |= MNT_ROOTFS;
|
|
mp->mnt_vnodecovered = NULLVP;
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
|
|
fs->fs_fsmnt[0] = '/';
|
|
bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
|
|
MNAMELEN);
|
|
(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
|
|
&size);
|
|
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
(void)ffs_statfs(mp, &mp->mnt_stat, p);
|
|
vfs_unlock(mp);
|
|
inittodr(fs->fs_time);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* VFS Operations.
|
|
*
|
|
* mount system call
|
|
*/
|
|
int
|
|
ffs_mount(mp, path, data, ndp, p)
|
|
register struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *devvp;
|
|
struct ufs_args args;
|
|
struct ufsmount *ump = 0;
|
|
register struct fs *fs;
|
|
u_int size;
|
|
int error, flags;
|
|
|
|
error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* If updating, check whether changing from read-only to
|
|
* read/write; if there is no device name, that's all we do.
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
error = 0;
|
|
if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
|
|
flags = WRITECLOSE;
|
|
if (mp->mnt_flag & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
if (vfs_busy(mp))
|
|
return (EBUSY);
|
|
error = ffs_flushfiles(mp, flags, p);
|
|
vfs_unbusy(mp);
|
|
}
|
|
if (!error && (mp->mnt_flag & MNT_RELOAD))
|
|
error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
|
|
if (error)
|
|
return (error);
|
|
if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR))
|
|
fs->fs_ronly = 0;
|
|
if (fs->fs_ronly == 0) {
|
|
fs->fs_clean = 0;
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
if (args.fspec == 0) {
|
|
/*
|
|
* Process export requests.
|
|
*/
|
|
return (vfs_export(mp, &ump->um_export, &args.export));
|
|
}
|
|
}
|
|
/*
|
|
* Not an update, or updating the name: look up the name
|
|
* and verify that it refers to a sensible block device.
|
|
*/
|
|
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
|
|
error = namei(ndp);
|
|
if (error)
|
|
return (error);
|
|
devvp = ndp->ni_vp;
|
|
|
|
if (devvp->v_type != VBLK) {
|
|
vrele(devvp);
|
|
return (ENOTBLK);
|
|
}
|
|
if (major(devvp->v_rdev) >= nblkdev) {
|
|
vrele(devvp);
|
|
return (ENXIO);
|
|
}
|
|
if ((mp->mnt_flag & MNT_UPDATE) == 0)
|
|
error = ffs_mountfs(devvp, mp, p);
|
|
else {
|
|
if (devvp != ump->um_devvp)
|
|
error = EINVAL; /* needs translation */
|
|
else
|
|
vrele(devvp);
|
|
}
|
|
if (error) {
|
|
vrele(devvp);
|
|
return (error);
|
|
}
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
(void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
|
|
bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
|
|
bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
|
|
MNAMELEN);
|
|
(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
|
|
&size);
|
|
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
(void)ffs_statfs(mp, &mp->mnt_stat, p);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Reload all incore data for a filesystem (used after running fsck on
|
|
* the root filesystem and finding things to fix). The filesystem must
|
|
* be mounted read-only.
|
|
*
|
|
* Things to do to update the mount:
|
|
* 1) invalidate all cached meta-data.
|
|
* 2) re-read superblock from disk.
|
|
* 3) re-read summary information from disk.
|
|
* 4) invalidate all inactive vnodes.
|
|
* 5) invalidate all cached file data.
|
|
* 6) re-read inode data for all active vnodes.
|
|
*/
|
|
int
|
|
ffs_reload(mountp, cred, p)
|
|
register struct mount *mountp;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register struct vnode *vp, *nvp, *devvp;
|
|
struct inode *ip;
|
|
struct csum *space;
|
|
struct buf *bp;
|
|
struct fs *fs;
|
|
int i, blks, size, error;
|
|
|
|
if ((mountp->mnt_flag & MNT_RDONLY) == 0)
|
|
return (EINVAL);
|
|
/*
|
|
* Step 1: invalidate all cached meta-data.
|
|
*/
|
|
devvp = VFSTOUFS(mountp)->um_devvp;
|
|
if (vinvalbuf(devvp, 0, cred, p, 0, 0))
|
|
panic("ffs_reload: dirty1");
|
|
/*
|
|
* Step 2: re-read superblock from disk.
|
|
*/
|
|
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
fs = (struct fs *)bp->b_data;
|
|
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
|
|
fs->fs_bsize < sizeof(struct fs)) {
|
|
brelse(bp);
|
|
return (EIO); /* XXX needs translation */
|
|
}
|
|
fs = VFSTOUFS(mountp)->um_fs;
|
|
bcopy(&fs->fs_csp[0], &((struct fs *)bp->b_data)->fs_csp[0],
|
|
sizeof(fs->fs_csp));
|
|
bcopy(bp->b_data, fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
ffs_oldfscompat(fs);
|
|
/*
|
|
* Step 3: re-read summary information from disk.
|
|
*/
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = fs->fs_csp[0];
|
|
for (i = 0; i < blks; i += fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
|
|
NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size);
|
|
brelse(bp);
|
|
}
|
|
loop:
|
|
for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
|
|
nvp = vp->v_mntvnodes.le_next;
|
|
/*
|
|
* Step 4: invalidate all inactive vnodes.
|
|
*/
|
|
if (vp->v_usecount == 0) {
|
|
vgone(vp);
|
|
continue;
|
|
}
|
|
/*
|
|
* Step 5: invalidate all cached file data.
|
|
*/
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
if (vinvalbuf(vp, 0, cred, p, 0, 0))
|
|
panic("ffs_reload: dirty2");
|
|
/*
|
|
* Step 6: re-read inode data for all active vnodes.
|
|
*/
|
|
ip = VTOI(vp);
|
|
error =
|
|
bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data +
|
|
ino_to_fsbo(fs, ip->i_number));
|
|
brelse(bp);
|
|
vput(vp);
|
|
if (vp->v_mount != mountp)
|
|
goto loop;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
int
|
|
ffs_mountfs(devvp, mp, p)
|
|
register struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
struct buf *bp;
|
|
register struct fs *fs;
|
|
dev_t dev = devvp->v_rdev;
|
|
struct partinfo dpart;
|
|
caddr_t base, space;
|
|
int havepart = 0, blks;
|
|
int error, i, size;
|
|
int ronly;
|
|
|
|
/*
|
|
* Disallow multiple mounts of the same device.
|
|
* Disallow mounting of a device that is currently in use
|
|
* (except for root, which might share swap device for miniroot).
|
|
* Flush out any old buffers remaining from a previous use.
|
|
*/
|
|
error = vfs_mountedon(devvp);
|
|
if (error)
|
|
return (error);
|
|
if (vcount(devvp) > 1 && devvp != rootvp)
|
|
return (EBUSY);
|
|
error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
|
|
if (error)
|
|
return (error);
|
|
|
|
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
|
|
if (error)
|
|
return (error);
|
|
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
|
|
size = DEV_BSIZE;
|
|
else {
|
|
havepart = 1;
|
|
size = dpart.disklab->d_secsize;
|
|
}
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
|
|
if (error)
|
|
goto out;
|
|
fs = (struct fs *)bp->b_data;
|
|
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
|
|
fs->fs_bsize < sizeof(struct fs)) {
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
|
|
bzero((caddr_t)ump, sizeof *ump);
|
|
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
|
|
M_WAITOK);
|
|
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
fs = ump->um_fs;
|
|
fs->fs_ronly = ronly;
|
|
if (!fs->fs_clean) {
|
|
printf("WARNING: %s was not properly dismounted\n",fs->fs_fsmnt);
|
|
}
|
|
if (ronly == 0) {
|
|
fs->fs_fmod = 1;
|
|
fs->fs_clean = 0;
|
|
}
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
base = space = malloc((u_long)fs->fs_cssize, M_UFSMNT,
|
|
M_WAITOK);
|
|
for (i = 0; i < blks; i += fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
|
|
NOCRED, &bp);
|
|
if (error) {
|
|
free(base, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
|
|
space += size;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
mp->mnt_data = (qaddr_t)ump;
|
|
mp->mnt_stat.f_fsid.val[0] = (long)dev;
|
|
mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
ump->um_mountp = mp;
|
|
ump->um_dev = dev;
|
|
ump->um_devvp = devvp;
|
|
ump->um_nindir = fs->fs_nindir;
|
|
ump->um_bptrtodb = fs->fs_fsbtodb;
|
|
ump->um_seqinc = fs->fs_frag;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ump->um_quotas[i] = NULLVP;
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
ffs_oldfscompat(fs);
|
|
if (ronly == 0)
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
return (0);
|
|
out:
|
|
if (bp)
|
|
brelse(bp);
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
|
|
if (ump) {
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sanity checks for old file systems.
|
|
*
|
|
* XXX - goes away some day.
|
|
*/
|
|
int
|
|
ffs_oldfscompat(fs)
|
|
struct fs *fs;
|
|
{
|
|
int i;
|
|
|
|
fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
|
|
fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
fs->fs_nrpos = 8; /* XXX */
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
quad_t sizepb = fs->fs_bsize; /* XXX */
|
|
/* XXX */
|
|
#if 0
|
|
fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
|
|
for (i = 0; i < NIADDR; i++) { /* XXX */
|
|
sizepb *= NINDIR(fs); /* XXX */
|
|
fs->fs_maxfilesize += sizepb; /* XXX */
|
|
} /* XXX */
|
|
#endif
|
|
fs->fs_maxfilesize = (u_quad_t) 1 << 39;
|
|
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
|
|
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
|
|
} /* XXX */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
int
|
|
ffs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct fs *fs;
|
|
int error, flags, ronly;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
}
|
|
error = ffs_flushfiles(mp, flags, p);
|
|
if (error)
|
|
return (error);
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
ronly = fs->fs_ronly;
|
|
if (!ronly) {
|
|
fs->fs_clean = 1;
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, p);
|
|
vrele(ump->um_devvp);
|
|
free(fs->fs_csp[0], M_UFSMNT);
|
|
free(fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush out all the files in a filesystem.
|
|
*/
|
|
int
|
|
ffs_flushfiles(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
int error;
|
|
|
|
if (!doforce)
|
|
flags &= ~FORCECLOSE;
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
int i;
|
|
error = vflush(mp, NULLVP, SKIPSYSTEM|flags);
|
|
if (error)
|
|
return (error);
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (ump->um_quotas[i] == NULLVP)
|
|
continue;
|
|
quotaoff(p, mp, i);
|
|
}
|
|
/*
|
|
* Here we fall through to vflush again to ensure
|
|
* that we have gotten rid of all the system vnodes.
|
|
*/
|
|
}
|
|
#endif
|
|
error = vflush(mp, NULLVP, flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
ffs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct fs *fs;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
if (fs->fs_magic != FS_MAGIC)
|
|
panic("ffs_statfs");
|
|
sbp->f_type = MOUNT_UFS;
|
|
sbp->f_bsize = fs->fs_fsize;
|
|
sbp->f_iosize = fs->fs_bsize;
|
|
sbp->f_blocks = fs->fs_dsize;
|
|
sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
|
|
fs->fs_cstotal.cs_nffree;
|
|
sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) -
|
|
(fs->fs_dsize - sbp->f_bfree);
|
|
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
|
|
sbp->f_ffree = fs->fs_cstotal.cs_nifree;
|
|
if (sbp != &mp->mnt_stat) {
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
|
|
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
|
|
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Go through the disk queues to initiate sandbagged IO;
|
|
* go through the inodes to write those that have been modified;
|
|
* initiate the writing of the super block if it has been modified.
|
|
*
|
|
* Note: we are always called with the filesystem marked `MPBUSY'.
|
|
*/
|
|
int
|
|
ffs_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register struct vnode *vp;
|
|
register struct inode *ip;
|
|
register struct ufsmount *ump = VFSTOUFS(mp);
|
|
register struct fs *fs;
|
|
int error, allerror = 0;
|
|
|
|
fs = ump->um_fs;
|
|
/*
|
|
* Write back modified superblock.
|
|
* Consistency check that the superblock
|
|
* is still in the buffer cache.
|
|
*/
|
|
if (fs->fs_fmod != 0) {
|
|
if (fs->fs_ronly != 0) { /* XXX */
|
|
printf("fs = %s\n", fs->fs_fsmnt);
|
|
panic("update: rofs mod");
|
|
}
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time.tv_sec;
|
|
allerror = ffs_sbupdate(ump, waitfor);
|
|
}
|
|
/*
|
|
* Write back each (modified) inode.
|
|
*/
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first;
|
|
vp != NULL;
|
|
vp = vp->v_mntvnodes.le_next) {
|
|
/*
|
|
* If the vnode that we are about to sync is no longer
|
|
* associated with this mount point, start over.
|
|
*/
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
if (VOP_ISLOCKED(vp))
|
|
continue;
|
|
ip = VTOI(vp);
|
|
if (((vp->v_type == VCHR) || ((ip->i_flag &
|
|
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0)) &&
|
|
vp->v_dirtyblkhd.lh_first == NULL)
|
|
continue;
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
error = VOP_FSYNC(vp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
vput(vp);
|
|
}
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
#ifdef QUOTA
|
|
qsync(mp);
|
|
#endif
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* Look up a FFS dinode number to find its incore vnode, otherwise read it
|
|
* in from disk. If it is in core, wait for the lock bit to clear, then
|
|
* return the inode locked. Detection and handling of mount points must be
|
|
* done by the calling routine.
|
|
*/
|
|
int
|
|
ffs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct fs *fs;
|
|
register struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int type, error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
|
|
return (0);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
|
|
if (error) {
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
|
|
MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_fs = fs = ump->um_fs;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
#ifdef QUOTA
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ip->i_dquot[i] = NODQUOT;
|
|
}
|
|
#endif
|
|
/*
|
|
* Put it onto its hash chain and lock it so that other requests for
|
|
* this inode will block if they arrive while we are sleeping waiting
|
|
* for old data structures to be purged or for the contents of the
|
|
* disk portion of this inode to be read.
|
|
*/
|
|
ufs_ihashins(ip);
|
|
|
|
/* Read in the disk contents for the inode, copy into the inode. */
|
|
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
/*
|
|
* The inode does not contain anything useful, so it would
|
|
* be misleading to leave it on its hash chain. With mode
|
|
* still zero, it will be unlinked and returned to the free
|
|
* list by vput().
|
|
*/
|
|
vput(vp);
|
|
brelse(bp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
|
|
brelse(bp);
|
|
|
|
/*
|
|
* Initialize the vnode from the inode, check for aliases.
|
|
* Note that the underlying vnode may have changed.
|
|
*/
|
|
error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp);
|
|
if (error) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
/*
|
|
* Finish inode initialization now that aliasing has been resolved.
|
|
*/
|
|
ip->i_devvp = ump->um_devvp;
|
|
VREF(ip->i_devvp);
|
|
/*
|
|
* Set up a generation number for this inode if it does not
|
|
* already have one. This should only happen on old filesystems.
|
|
*/
|
|
if (ip->i_gen == 0) {
|
|
if (++nextgennumber < (u_long)time.tv_sec)
|
|
nextgennumber = time.tv_sec;
|
|
ip->i_gen = nextgennumber;
|
|
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
|
|
ip->i_flag |= IN_MODIFIED;
|
|
}
|
|
/*
|
|
* Ensure that uid and gid are correct. This is a temporary
|
|
* fix until fsck has been changed to do the update.
|
|
*/
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
ip->i_uid = ip->i_din.di_ouid; /* XXX */
|
|
ip->i_gid = ip->i_din.di_ogid; /* XXX */
|
|
} /* XXX */
|
|
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* File handle to vnode
|
|
*
|
|
* Have to be really careful about stale file handles:
|
|
* - check that the inode number is valid
|
|
* - call ffs_vget() to get the locked inode
|
|
* - check for an unallocated inode (i_mode == 0)
|
|
* - check that the given client host has export rights and return
|
|
* those rights via. exflagsp and credanonp
|
|
*/
|
|
int
|
|
ffs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
register struct ufid *ufhp;
|
|
struct fs *fs;
|
|
|
|
ufhp = (struct ufid *)fhp;
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
if (ufhp->ufid_ino < ROOTINO ||
|
|
ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
|
|
return (ESTALE);
|
|
return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ffs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
register struct inode *ip;
|
|
register struct ufid *ufhp;
|
|
|
|
ip = VTOI(vp);
|
|
ufhp = (struct ufid *)fhp;
|
|
ufhp->ufid_len = sizeof(struct ufid);
|
|
ufhp->ufid_ino = ip->i_number;
|
|
ufhp->ufid_gen = ip->i_gen;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
int
|
|
ffs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
register struct fs *fs = mp->um_fs;
|
|
register struct buf *bp;
|
|
int blks;
|
|
caddr_t space;
|
|
int i, size, error = 0;
|
|
|
|
bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
/* Restore compatibility to old file systems. XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
((struct fs *)bp->b_data)->fs_nrpos = -1; /* XXX */
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = (caddr_t)fs->fs_csp[0];
|
|
for (i = 0; i < blks; i += fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
|
|
size, 0, 0);
|
|
bcopy(space, bp->b_data, (u_int)size);
|
|
space += size;
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
}
|
|
return (error);
|
|
}
|